根据对话内容，从方框中选择恰当的单词填空，使对话完整、通顺
follow, ground，lead，brave，voice |
A：Hey, Gretel! What can you see on the____? Can you see any bread?
B：No, Hansel．
A：That's too bad．We can't find the pieces of bread．We might be lost．
B：What should we do, Hansel?
A：Take it easy! Be ____! Listen! What can you hear?
B：I can hear a bird's ____．
A：Yeah! The bird ate our bread．____it and then we might find our way．
B：You mean the bird will ____us through the forest．
A：I think so．
B：Great! Let's go!
